oj.uz

Submission #170715

# Submission time Handle Problem Language Result Execution time Memory
170715 2019-12-26T07:50:41 Z nafis_shifat Xylophone (JOI18_xylophone) C++14
100 / 100
 81 ms 524 KB 
#include "xylophone.h"
#include<bits/stdc++.h>
using namespace std;
const int mxn=5001;
 int a[mxn];
int ek;
int cnt[mxn]={};
void solve(int N)
{

	int k;
	int lo=1;
	int hi=N;
	while(lo<=hi)
	{
		int mid=lo+hi>>1;

		if(query(mid,N)==N-1)
		{
			lo=mid+1;
		}
		else
		{
			k=mid;
			hi=mid-1;
		}

	}

	a[k-1]=1;
	cnt[1]=1;
	ek=k-1;



	for(int i=ek-1;i>0;i--)
	{
		k=query(i,i+1);

		if(a[i+1]-k<=0 || cnt[a[i+1]-k]==1)
		{
			a[i]=a[i+1]+k;
			cnt[a[i+1]+k]=1;
		}

		else if(a[i+1]+k>N || cnt[a[i+1]+k]==1)
		{
			a[i]=a[i+1]-k;
			cnt[a[i+1]-k]=1;
		}

		else
		{
			int tmp=query(i,i+2);

			if(max(a[i+1]+k,a[i+2])-min(a[i+1],a[i+2])==tmp)
			{
				a[i]=a[i+1]+k;
				cnt[a[i+1]+k]=1;
			}
			else
			{
				a[i]=a[i+1]-k;
				cnt[a[i+1]-k]=1;
			}
		}

	}


	for(int i=ek+1;i<=N;i++)
	{
	   
		k=query(i-1,i);

		if(a[i-1]-k<=0 || cnt[a[i-1]-k]==1)
		{
			a[i]=a[i-1]+k;
			cnt[a[i-1]+k]=1;
		}

		else if(a[i-1]+k>N || cnt[a[i-1]+k]==1)
		{
			a[i]=a[i-1]-k;
			cnt[a[i-1]-k]=1;
		}

		else
		{
			int tmp=query(i-2,i);

			if(max(a[i-1]+k,a[i-2])-min(a[i-1],a[i-2])==tmp)
			{
				a[i]=a[i-1]+k;
				cnt[a[i-1]+k]=1;
			}
			else
			{
				a[i]=a[i-1]-k;
				cnt[a[i-1]-k]=1;
			}
		}

	}



	



	for(int i = 1; i <= N; i++)
	{
	    answer(i,a[i]);
	
	}

}

Compilation message

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:16:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid=lo+hi>>1;
           ~~^~~
xylophone.cpp:36:10: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int i=ek-1;i>0;i--)
          ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 316 KB Output is correct
5 Correct 3 ms 248 KB Output is correct
6 Correct 3 ms 396 KB Output is correct
7 Correct 3 ms 248 KB Output is correct
8 Correct 4 ms 376 KB Output is correct
9 Correct 3 ms 248 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 4 ms 248 KB Output is correct
13 Correct 3 ms 380 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 400 KB Output is correct

Subtask #2
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 316 KB Output is correct
5 Correct 3 ms 248 KB Output is correct
6 Correct 3 ms 396 KB Output is correct
7 Correct 3 ms 248 KB Output is correct
8 Correct 4 ms 376 KB Output is correct
9 Correct 3 ms 248 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 4 ms 248 KB Output is correct
13 Correct 3 ms 380 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 400 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 9 ms 376 KB Output is correct
18 Correct 12 ms 248 KB Output is correct
19 Correct 12 ms 376 KB Output is correct
20 Correct 10 ms 316 KB Output is correct
21 Correct 9 ms 404 KB Output is correct
22 Correct 9 ms 396 KB Output is correct
23 Correct 12 ms 248 KB Output is correct
24 Correct 12 ms 248 KB Output is correct
25 Correct 12 ms 376 KB Output is correct
26 Correct 15 ms 376 KB Output is correct
27 Correct 16 ms 248 KB Output is correct
28 Correct 19 ms 248 KB Output is correct
29 Correct 16 ms 248 KB Output is correct
30 Correct 14 ms 316 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 316 KB Output is correct
5 Correct 3 ms 248 KB Output is correct
6 Correct 3 ms 396 KB Output is correct
7 Correct 3 ms 248 KB Output is correct
8 Correct 4 ms 376 KB Output is correct
9 Correct 3 ms 248 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 4 ms 248 KB Output is correct
13 Correct 3 ms 380 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 400 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 9 ms 376 KB Output is correct
18 Correct 12 ms 248 KB Output is correct
19 Correct 12 ms 376 KB Output is correct
20 Correct 10 ms 316 KB Output is correct
21 Correct 9 ms 404 KB Output is correct
22 Correct 9 ms 396 KB Output is correct
23 Correct 12 ms 248 KB Output is correct
24 Correct 12 ms 248 KB Output is correct
25 Correct 12 ms 376 KB Output is correct
26 Correct 15 ms 376 KB Output is correct
27 Correct 16 ms 248 KB Output is correct
28 Correct 19 ms 248 KB Output is correct
29 Correct 16 ms 248 KB Output is correct
30 Correct 14 ms 316 KB Output is correct
31 Correct 36 ms 376 KB Output is correct
32 Correct 46 ms 348 KB Output is correct
33 Correct 37 ms 432 KB Output is correct
34 Correct 68 ms 348 KB Output is correct
35 Correct 63 ms 476 KB Output is correct
36 Correct 47 ms 348 KB Output is correct
37 Correct 61 ms 252 KB Output is correct
38 Correct 51 ms 376 KB Output is correct
39 Correct 73 ms 248 KB Output is correct
40 Correct 51 ms 340 KB Output is correct
41 Correct 73 ms 248 KB Output is correct
42 Correct 59 ms 380 KB Output is correct
43 Correct 51 ms 376 KB Output is correct
44 Correct 62 ms 248 KB Output is correct
45 Correct 48 ms 324 KB Output is correct
46 Correct 81 ms 380 KB Output is correct
47 Correct 65 ms 436 KB Output is correct
48 Correct 78 ms 248 KB Output is correct
49 Correct 55 ms 400 KB Output is correct
50 Correct 37 ms 400 KB Output is correct
51 Correct 67 ms 352 KB Output is correct
52 Correct 43 ms 524 KB Output is correct
53 Correct 65 ms 376 KB Output is correct
54 Correct 70 ms 248 KB Output is correct
55 Correct 62 ms 376 KB Output is correct
56 Correct 54 ms 376 KB Output is correct
57 Correct 64 ms 352 KB Output is correct
58 Correct 73 ms 384 KB Output is correct
59 Correct 69 ms 248 KB Output is correct
60 Correct 68 ms 248 KB Output is correct